Ciena Tumbles 10% as In-Line Guidance Overshadows Earnings Beat, Arista Edges Higher
Yahoo Finance · Sep 3, 2026 · SPDR S&P 500 ETF Trust (SPY)
Ciena just posted a record quarter with earnings well above estimates, yet its stock cratered 10% while networking peers Arista and Cisco held firm or climbed. The divergence points to a specific pressure point that separates Ciena's story from the broader AI networking boom.
Not investment advice. Cached headline, not a full reprint.